JP5991288B2 - 5-port switching valve with residual pressure discharge valve - Google Patents

Description

  The present invention provides a 5-port switching valve with a residual pressure discharge valve for automatically discharging residual pressure remaining in a fluid pressure circuit through which pressure air is supplied and discharged via the switching valve. The present invention relates to a 5-port switching valve with a residual pressure discharge valve configured to constitute a safety circuit that prevents malfunction or unexpected operation.

  For example, in a general-purpose closed center type 5-port electromagnetic switching valve, a central supply passage, a pair of output passages on both sides thereof, and both sides of the output passages are formed in a valve hole penetrating the main valve body. A pair of discharge passages positioned on the valve hole end side are respectively opened, the supply passage is communicated with a supply port opening on the outer surface of the main valve body, and a pair of output passages on both sides of the supply passage is provided. A pair of output ports A and B of the main valve body are further communicated with a pair of discharge ports on both sides of the output flow channels, respectively.

  Then, a main valve body provided with an annular seal member made of an elastic body is slidably inserted into the valve hole, and the main valve body acts on any one of the pistons abutting on both ends thereof. Driven by the fluid pressure operating force, the two switching positions in the valve hole, that is, the supply port communicates with one of the pair of output ports A and B, and the other output port communicates with the discharge port. Contrary to this, the first switching position is configured to be moved to the second switching position where the supply port is communicated with the other output port and the other output port is communicated with the discharge port. In addition, when no fluid pressure operating force is applied to any of the pistons, a neutral force in which none of the flow paths provided in the valve holes communicate with each other due to the biasing force of the spring acting on the main valve body. Switch to position Configured as a function ones.

  In a 5-port switching valve having such a closed center position (neutral position), fluid pressure is supplied from the supply port to either of the output ports A and B, and is connected to the output port. When the main valve body is returned to the neutral position in order to operate the equipment and to end the operation, the pressure air that operated the fluid pressure equipment by the 5-port switching valve is contained as residual pressure on the fluid pressure circuit side. When the residual pressure is discharged due to some unforeseen cause, the fluid pressure equipment in which the residual pressure is contained may malfunction or unexpectedly operate and become dangerous. In some cases, it is necessary to discharge the residual pressure.

  The technical problem of the present invention is that the main valve is constituted by a five-port switching valve having a closed center position, the main valve body in the main valve is in the closed center position, and a pair of output ports in the main valve is provided. When it is desired to discharge the residual pressure of the fluid pressure circuit in communication, the residual pressure can be discharged by shutting off the supply of pressure air to the supply port of the main valve. It is an object of the present invention to provide a 5-port switching valve with a residual pressure discharge valve having a simple configuration that can constitute a safety circuit that prevents malfunction or unexpected operation of equipment.

In order to solve the above problems, according to the present invention, a residual pressure discharge valve is attached to a main valve constituted by a 5-port switching valve in which the main valve element can take a closed center position. Two discharge passages individually communicating with the two output passages of the main valve in the valve passage hole provided in the body and opening the output passages to the atmosphere through the discharge ports, and the two discharge passages Each of the discharge valve seats, a pair of discharge valve bodies that individually contact and separate the discharge valve seats to open and close the discharge flow path, and a direction in which the pair of discharge valve bodies are separated from the discharge valve seats, respectively. And a driving pressure chamber formed between the pair of discharge valve bodies and communicated with the supply flow path of the main valve, and the end of the valve passage hole opens to the outside, the rear end of each of the pair of the discharge valve body, exposed to the outside from the end of opening of the valve hole, the drive pressure The air supply from the supply passage to the chamber, the discharge valve body is pressed against the discharge valve seat against the biasing force of the spring as well as closing the discharge passage, the rear end of the discharge valve body part occupies the open position equivalent to the end portion of the valve hole, in a state where no air supply from the supply passage to the drive pressure chamber, spaced from the discharge valve seat the discharge valve body by the urging force of the spring The discharge passage is opened, and the rear end of the discharge valve body occupies a position indented from the end of the opening of the valve passage hole. A valved 5-port switching valve is provided.

  In a preferred embodiment of a 5-port switching valve with a residual pressure discharge valve according to the present invention, the main valve communicates a supply flow path with a central portion in the longitudinal direction of a valve hole passing through the main valve body, and on both sides thereof. Constructed by communicating the two output flow paths and communicating the discharge flow paths to the respective valve hole end sides of the output flow paths, and slidably inserting the main valve body into the valve holes. The main valve body has two positions for communicating the supply flow path communicating with the supply port with one of the two output flow paths and communicating the other output flow path with the discharge flow path adjacent thereto. , And each flow path provided in the valve hole can be switched to a neutral position where they do not communicate with each other, and the main valve body is provided with a drive mechanism for driving it to the two positions, respectively. In addition, the main valve body is neutral in the valve hole. Return spring for biasing is provided to move the location, thereby constructed as being formed on the closed center type.

  In an embodiment of the 5-port switching valve according to the present invention, the drive mechanism of the main valve body includes a pair of pistons that respectively contact the both end portions of the main valve body and drive the main valve body, It is desirable that the piston chamber is slidably accommodated with a pilot solenoid valve for introducing pilot air for driving the main valve body.

  In a preferred embodiment of the 5-port switching valve with a residual pressure discharge valve according to the present invention, a mounting seat for the residual pressure discharge valve is provided on the outer surface of the main valve body, and a valve hole in the main valve body is provided in the mounting seat. The supply passage and the two output passages that communicate with each other are arranged in rows, and the main valve body is provided on the mounting surface of the residual pressure discharge valve body to the mounting seat. The main valve body is provided with a through hole communicating with the drive pressure chamber in correspondence with the communication port of the supply flow path, and with two through holes corresponding to the communication ports of the two output flow paths of the main valve body. The residual pressure discharge valve can be fixed to the mounting seat of the main valve body by airtightly joining the respective communication holes of the mounting seat in the body and the corresponding through holes.

Furthermore, when fixing the residual pressure discharge valve to the mounting seat of the main valve body, the central axis of the valve passage hole provided in the body of the residual pressure discharge valve is parallel to the valve hole in the main valve. In the mounting seat of the main valve body, a communication port for the main valve supply passage and the two output passages is individually opened, and the mounting seat on the body mounting surface of the residual pressure discharge valve It is also possible to drill through-holes toward the respective communication ports and fix the mounting surface of the residual pressure discharge valve to the mounting seat via a gasket. The residual pressure discharge valve is detachable from the main valve body. Instead of the residual pressure discharge valve attached to the mounting seat of the main valve body, each communication port of the mounting seat is individually airtight. It is desirable that the closing body lid be mounted interchangeably.
Further, one of the valve passage holes is formed inside the body of the residual pressure discharge valve, and the pair of discharge valve bodies are disposed in the valve passage holes so that the recesses formed at the respective tips are directly opposed to each other. The driving pressure chamber may be formed by the recess.

  According to the 5-port switching valve with a residual pressure discharge valve of the present invention described in detail above, the main valve body in the main valve constituted by the 5-port switching valve having the closed center position is at the closed center position, When it is desired to discharge the residual pressure of the fluid pressure circuit communicating with the pair of output ports in the switching valve, the residual pressure is discharged by an operation to cut off the supply of pressure air to the supply port of the main valve. In addition, the fluid pressure circuit including the 5-port switching valve can function as a safety circuit that prevents malfunction or unexpected operation of the fluid pressure device due to the residual pressure.

It is a principal part longitudinal cross-sectional view which shows the whole structure of the Example of the 5 port switching valve with a residual pressure discharge valve which concerns on this invention. It is a principal part disassembled perspective view of the said Example shown in the state which exposed the pilot solenoid valve. It is principal part sectional drawing which shows the state by which air was supplied to the supply port in the said Example. It is explanatory drawing about the mounting aspect of the residual pressure discharge valve in the said Example. It is a perspective view of the state where it replaced with the residual pressure discharge valve on the main valve body of the 5-port switching valve in the above-mentioned embodiment, and was equipped with a body lid.

  FIG. 1 shows an example of implementation of a 5-port switching valve 10 with a residual pressure discharge valve according to the present invention, and FIG. 2 shows its internal structure, in particular, the internal structure of a residual pressure discharge valve 40 to be mounted on the main valve 20. Is clearly shown. The main valve 20 is a 5-port electromagnetic switching valve having a known closed center position, as will be described in detail below.

  The main valve 20 in the 5-port switching valve 10 with the residual pressure discharge valve is provided with a body 41 of the residual pressure discharge valve 40 on the main valve body 21, and the main valve 20 itself is as follows. The supply passage 23, the pair of output passages 24A and 24B, and the pair of exhaust passages 25A and 25B are opened inside the valve hole 22 opened to penetrate the main valve body 21, and more specifically. In the center of the valve hole 22 in the longitudinal direction, a supply flow path 23 connected to the supply port P of the main valve body 21 is communicated, and the main valve body 21 is connected to both sides of the supply flow path 23 in the valve hole 22. Two exhaust ports EA, EB of the main valve body 21 are connected to the output passages 24A, 24B connected to the two output ports A, B on the valve hole end side of the output passages 24A, 24B in the valve hole 22, respectively. Exhaust flow paths 25A, 25 connected to The provided, the main valve body 27 for switching the flow path is fitted slidably in the axial direction in the valve bore 22.

  As a drive mechanism for the main valve body 27, an adapter block 30a that houses a piston 28a that contacts and drives one end of the main valve body 27 on one end side in the axial direction of the main valve body 21, On the other end side of the main valve body 21, an adapter block containing a piston 28b that contacts and drives the other end portion of the main valve body 27 via an adapter block 35 for the return mechanism of the main valve body 27. 30b are connected and arranged. The pistons 28a and 28b are slidably accommodated in the piston chambers 31a and 31b in the adapter blocks 30a and 30b, and are opposite to the contact surface side of the piston chambers 31a and 31b with the main valve body 27. 1 and 2, each compartment communicates with each pilot output port (not shown) of a well-known pair of pilot solenoid valves 32a and 32b fixed to one end of the five-port switching valve 10. Has been.

  More specifically, when the pilot solenoid valve 32a is driven while the pilot solenoid valve 32b is not energized, the pilot air from the pilot output port passes through a passage (not shown) in the adapter block 30a that houses the piston 28a. ), The piston chamber 31b is opened to the atmosphere through the pilot electromagnetic valve 32b, and the pilot air presses the main valve body 27 via the piston 28a. 1 is driven to the first switching position reaching the right end. As a result, the supply flow path 23 connected to the supply port P opens to the output flow path 24A side connected to the output port A and is connected to the output port A. It is supplied to the required fluid pressure circuit.

  Conversely, when the pilot solenoid valve 32a is de-energized and the pilot solenoid valve 32b is driven, the output flow path 24A communicates with the exhaust flow path 25A and the pressure of the fluid pressure circuit connected to the output port A Air is exhausted, and pilot air from the pilot output port of the pilot solenoid valve 32b passes through the adapter block 30a, the main valve body 21, the adapter block 35 for the return mechanism, and the passage (not shown) in the adapter block 30b. Then, the pilot air is introduced into the piston chamber 31b and the pilot air presses the main valve body 27 via the piston 28b, so that the main valve body 27 is driven to the second switching position reaching the left end in FIG. The supply flow path 23 connected to the supply port P opens to the output flow path 24B connected to the output port B and is connected to the output port B. Pressure air is supplied to the required fluid pressure circuit it is.

In this way, when one of the pilot solenoid valves is energized, pilot air is introduced from one of its output ports into one of the piston chambers, and the other pilot solenoid valve is energized to communicate with it. Air is discharged through the pilot discharge port, whereby the main valve element 27 is driven to switch between the two valve positions in the valve hole 22. These operations are not different from the operations of the generally known two-position five-port electromagnetic switching valve.
A through hole 27b is provided at the center of the main valve body 27. The through hole 27b is provided in the piston chambers 31a and 31b when the pistons 28a and 28b are driven as described above. This is for releasing the air existing in the space on the contact surface side to 27.

  The above-described adapter block 35 for the return mechanism of the main valve element 27 is configured so that the main valve element 27 opens in the valve hole 22 in the valve hole 22 when the pair of pilot solenoid valves 32a and 32b is not energized. A return mechanism for returning to a neutral position that does not allow any of them to communicate with each other is provided, and a through hole having a step portion 36a that communicates with the valve hole 22 of the main valve body 21 inside the adapter block 35. 36, and is hermetically attached between the main valve body 21 and the adapter block 30b, and the main valve body 27 is passed through the through hole 36. In the adjacent adapter block 30b, the main valve body 27 The tip is brought into contact with the piston 28b.

  Then, a narrow diameter portion 27a is formed in a portion of the main valve body 27 inserted into the through hole 36 of the adapter block 35, and a pair of spring receivers 37, 38 are fitted on the narrow diameter portion 27a. A return spring 39 is contracted between the spring receivers 37, 38, and one spring receiver 37 located on the main valve body 21 side has an outer peripheral side of its flange-shaped contact surface 37a on the main valve body 21 as an inner periphery. On the other hand, the spring receiver 38 on the adapter block 30b side faces the outer peripheral side of the flange-shaped contact surface 38a in the through hole 36 of the adapter block 35. The inner peripheral side of the step portion 36 a faces the step portion for forming the small diameter portion of the main valve element 27.

  The return mechanism of the main valve body 27 having the above configuration is, for example, when the pilot solenoid valve 32a is energized to introduce pilot air into the piston chamber 31a and the main valve body 27 is pressed by the piston 28a. When the spring receiver 37 is pressed and moved, the return spring 39 is compressed and driven to the first switching position. Conversely, the pilot solenoid valve 32b is energized and pilot air is introduced into the piston chamber 31b. When the main valve body 27 is pressed in the direction opposite to that described above by the piston 28b, the main valve body 27 presses and moves the spring receiver 38, thereby compressing the return spring 39. Driven to the second switching position. When the pilot air is not introduced into both the piston chambers 31a, 31b, the return spring 39 pushes the distance between the spring receivers 37, 38 by the compression force accumulated therein and moves it to the position shown in FIG. As a result, the main valve element 27 is held in the neutral position of FIG. 1, that is, the closed center position. The return mechanism of the main valve body 27 described above is not necessarily provided in the adapter block 35 between the main valve body 21 and the adapter block 30b, and may be provided in the main valve body 21 or the like, for example.

Next, with reference to FIG.1 and FIG.2, the structure and effect | action of the residual pressure discharge valve 40 attached to the main valve comprised by the 5-port switching valve 10 are demonstrated.
The residual pressure discharge valve 40 is configured such that the base 41a of the body 41 is connected to a flat mounting seat 21a provided on the upper outer surface of the main valve body 21. The supply flow path 23 communicating with the valve hole 22 in the valve body 21 and the holes directed to the two output flow paths 24A and 24B are individually opened, so that the communication hole communicates with the supply flow path 23 through the hole located at the center. The ports 42 and holes located on both sides thereof are connected to the two output channels 24A and 24B as communication ports 43a and 43b, which are arranged in a line.

  Further, on the mounting surface 41b of the base portion 41a of the body 41 of the residual pressure discharge valve 40 fixed to the mounting seat 21a, through holes 44, respectively toward the communication ports 42, 43a, 43b of the mounting seat 21a. 45a and 45b are drilled, and in order to air-tightly connect them to the respective through holes corresponding to the respective communication ports 42, 43a and 43b of the mounting seat 21a, between the mounting seat 21a in the main valve body 21 Both are fixed with a gasket 46 interposed. If the base part 41a of the body 41 of the residual pressure discharge valve 40 is fixed on the main valve body 21 by such a structure, both air passages can be reliably formed with a simple structure.

  The attachment of the body 41 of the residual pressure discharge valve 40 to the mounting seat 21a of the main valve body 21 is provided at the end of the residual pressure discharge valve 40 on the adapter block 30a side, as can be seen from FIGS. The protrusion 47 is engaged with a recess 48 provided in the adapter block 30a, while the end of the body 41 on the adapter block 35 side can be elastically projected and retracted in the body 41 as shown in FIG. In a state in which the protruding protrusion 49 is provided and the protrusion 47 at the one end of the body 41 is engaged with the recess 48 provided in the adapter block 30a, the body 41 is pushed down in the direction indicated by the arrow in FIG. The protrusion / projection protrusion 49 is configured to be elastically engaged with a recess 50 provided in the adapter block 35. However, the fixing of the residual pressure discharge valve 40 to the mounting seat 21a of the main valve body 21 is not necessarily limited to such a configuration, and any fixing means can be employed.

  As shown in FIG. 1, the residual pressure discharge valve 40 is provided with a valve passage hole 51 having a central axis parallel to the valve hole 22 of the main valve in the body 41, and the valve passage hole 51 includes the valve passage hole 51. A pair of identical discharge valve bodies 53 that are in contact with each other at an inner position of the through-hole 44 are slidably accommodated with a recess 53a for forming a driving pressure chamber 54 disposed therebetween. A check seal 55 is provided around the pair of discharge valve bodies 53 to prevent the pressure air introduced into the drive pressure chamber 54 through the through holes 44 from flowing out through the discharge valve body 53. The exhaust valve body 53 is disposed so as to be positioned on both sides of the through hole 44 when the discharge valve body 53 is in contact.

  Further, a pair of through holes 45a and 45b communicating with the two output flow paths 24A and 24B of the main valve are discharge flow paths 56a and 56b formed around the respective discharge valve bodies 53 at both side positions of the check seal 55. The discharge passages 56a and 56b are opened to the atmosphere at the discharge ports 51a and 51b at both ends of the valve passage hole 51 through the valve passage hole 51, respectively. In order to open and close 56b by the discharge valve body 53, seal members 57 are provided around the discharge valve body 53, respectively, and are opposed to the discharge valve seats 58a and 58b provided on the inner surface of the valve passage hole 51. .

Further, the discharge valve bodies 53 are respectively provided with springs 59 so as to be contracted between them and both end portions of the valve passage hole 51 so that the seal members 57 in the discharge valve bodies 53 are respectively connected to the discharge valve seats 58a and 58b. The pair of discharge valve bodies 53 are spring-biased so as to contact each other at the central portion of the valve passage hole 51.
Of the discharge valve body 53 inserted through the valve passage hole 51, the discharge valve seat 58 a that opens and closes the discharge valve body 53 that discharges the pressure air from the through hole 45 a is the inner surface of the valve passage hole 51 of the body 41. However, the discharge valve seat 58b that opens and closes the other discharge valve body 53 is formed of an end member 61 that forms a discharge port 51b at the end of the valve passage hole 51 through which the discharge valve body 53 is inserted. As shown clearly in FIG. 2, the end member 61 provided at the inner end is attached to the body 41 by a U-shaped clip 62 inserted through the body 41 and the fixing hole 63 provided in the end member 61. It is attached.

  In the residual pressure discharge valve 40 having the above-described configuration, through supply of air to the supply port P of the main valve, through the through hole 44 that communicates with the communication port 42 in the mounting seat 21a of the main valve body 21 that communicates with the supply flow path 23. When the pressure air from the supply flow path 23 is supplied to the drive pressure chamber 54 formed by the pair of recesses 53a at the joint ends of the discharge valve bodies 53, the pair of discharge valve bodies 53 is shown by the pressure air. 1 is moved from the open position of the discharge valve seats 58a and 58b to the closed position of the discharge valve seats 58a and 58b shown in FIG. 3, and in this state, the communication port 43a communicates with the two output flow paths 24A and 24B. , 43 b is not discharged from the discharge ports 51 a and 51 b at both ends of the valve passage hole 51 through the passage holes 45 a and 45 b communicating with the valve passage hole 51.

That is, when air is supplied to the supply port P of the main valve in order to supply air to the fluid pressure circuit connected to the pair of output ports A and B in the main valve and operate them, the main valve By supplying air from the supply flow path 23 to the drive pressure chamber 54 of the residual pressure discharge valve 40, the discharge valve body 53 is pressed against the discharge valve seats 58a and 58b against the urging force of the spring 59 acting on it. Thus, the discharge valve seats 58a and 58b are closed, so that the presence of the residual pressure discharge valve 40 itself does not affect the drive of the fluid pressure circuit connected to the pair of output ports A and B in the main valve.
On the other hand, if the air supply to the supply flow path 23 is cut off, the discharge valve seats 58a and 58b of the residual pressure discharge valve 40 are opened by the bias of the spring 59 of the discharge valve body 53. All of the residual pressure of the fluid pressure circuit connected to the pair of output ports A and B is discharged through the residual pressure discharge valve 40.

  As described above, the residual pressure discharge valve 40 is fixed to the main valve body 21 by engaging the protrusion 47 provided on the body 41 of the residual pressure discharge valve 40 with the recess 48 provided on the adapter block 30a. Since the protruding and projecting protrusions 49 provided at the other end of the body 41 are elastically engaged with the recesses 50 provided in the adapter block 35 so as to be detachable, the residual pressure discharge valve 40 attached to the mounting seat 21a is provided. As shown in FIG. 5, the body lid 65 that individually closes each communication port of the mounting seat 21a can be attached in an exchangeable manner, and in this case, the body lid 65 can be replaced. The protrusion 47 and the protrusion / depression protrusion 49 may be provided in the same manner as in the case of the residual pressure discharge valve 40, but the point is that the body 41 of the residual pressure discharge valve 40 and the structure of the body lid 65 may be the same. ,Thereby The 5-port switch valve 10 can be diverted to when case of attaching a remaining shut-off valve 40 and not having the same.

DESCRIPTION OF SYMBOLS 10 5 port switching valve 21 Main valve body 22 Valve hole 23 Supply flow path 24A, 24B Output flow path 27 Main valve body 39 Spring for return 40 Residual pressure discharge valve 41 Body 51 Valve through hole 51a, 51b Discharge port 53 Discharge valve body 54 Drive pressure chamber 56a, 56b Discharge flow path 58a, 58b Discharge valve seat 59 Spring P Supply port A, B Output port EA, EB Discharge port

Claims (6)

A residual pressure discharge valve is attached to the main valve which is constituted by a 5-port switching valve in which the main valve body can take a closed center position.
The residual pressure discharge valve has two discharge passages individually communicating with the two output passages of the main valve in a valve passage hole provided in the body and opening the output passage to the atmosphere through a discharge port. A discharge valve seat formed in each of the two discharge flow paths, a pair of discharge valve bodies that individually contact and separate from the discharge valve seat and open and close the discharge flow path, and the pair of discharge valve bodies respectively. A spring that urges in a direction away from the discharge valve seat, and a drive pressure chamber that is formed between the pair of discharge valve bodies and communicates with the supply flow path of the main valve,
An end portion of the valve passage hole is opened to the outside, and a rear end portion of each of the pair of discharge valve bodies is exposed to the outside from an opening portion of the valve passage hole,
By supplying air from the supply flow path to the drive pressure chamber, the discharge valve body is pressed against the discharge valve seat against the biasing force of the spring to close the discharge flow path, and the discharge valve body When the rear end occupies the same position as the open end of the valve passage hole and no air is supplied from the supply flow path to the drive pressure chamber , the discharge valve body is urged by the spring biasing force. The exhaust flow path is opened apart from the seat, and the rear end portion of the discharge valve body is configured to occupy a position recessed inside the end portion where the valve passage hole is opened .
A five-port switching valve with a residual pressure discharge valve. The main valve communicates the supply flow path with the central portion in the longitudinal direction of the valve hole passing through the main valve body, communicates two output flow paths on both sides thereof, and each valve hole end of the output flow path Each of which is formed by slidably fitting the main valve body into the valve hole, respectively,
The main valve body has two positions for communicating the supply flow channel communicating with the supply port with one of the two output flow channels and communicating the other output flow channel with the discharge flow channel adjacent thereto, and Each of the flow paths provided in the valve hole can be switched to a neutral position where they do not communicate with each other.
The main valve body is provided with a drive mechanism for driving the main valve body to the two positions, and a return spring for biasing the main valve body to move to the neutral position within the valve hole. And thereby formed into a closed center type,
The 5-port switching valve with a residual pressure discharge valve according to claim 1. The drive mechanism of the main valve body includes a pair of pistons that respectively contact the both end portions of the main valve body to drive the main valve body, and further, in a piston chamber that slidably accommodates these pistons, It is configured by including a pilot solenoid valve that introduces pilot air for driving the main valve body,
The 5-port switching valve with a residual pressure discharge valve according to claim 2. A mounting seat for the residual pressure discharge valve is provided on the outer surface of the main valve body,
In the mounting seat, a communication port in which the supply channel and the two output channels communicating with the valve hole in the main valve body are individually opened is arranged in a row,
The mounting surface of the residual pressure discharge valve body to the mounting seat is provided with a through hole communicating with the drive pressure chamber corresponding to the communication port of the supply passage of the main valve body, and the main valve body The residual pressure discharge valve is provided with two through holes corresponding to the communication ports of the two output flow paths, and the communication holes of the mounting seat in the main valve body and the corresponding through holes are hermetically joined to each other. Is fixed to the mounting seat of the main valve body,
The 5-port switching valve with a residual pressure discharge valve according to claim 2 or 3, wherein The valve passage hole provided in the body of the residual pressure discharge valve is assumed to have a central axis parallel to the valve hole in the main valve
In the mounting seat of the main valve body, a communication port for the main valve supply flow path and the two output flow paths is individually opened,
On the mounting surface of the body of the residual pressure discharge valve, a through hole is formed for each communication port of the mounting seat,
The mounting surface of the residual pressure discharge valve is fixed to the mounting seat via a gasket,
The 5-port switching valve with a residual pressure discharge valve according to claim 4. One valve passage hole is formed inside the body of the residual pressure discharge valve,
The pair of discharge valve bodies are disposed in the valve passage hole so that the concave portions formed at the respective tips are directly opposed to each other, and the driving pressure chamber is formed by the concave portions.
The 5-port switching valve with a residual pressure discharge valve according to any one of claims 1 to 5 .

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